Home: http://www.uddi.org/
Intro white paper: http://www.uddi.org/pubs/Iru_UDDI_Technical_White_Paper.pdf
Spec: http://uddi.org/pubs/uddi-v3.0.1-20031014.htm

UDDI refers to a spec and implementation of a "technical discovery layer". It's basically a web services yellow pages; a mechanism for businesses to publish information about the Web Services that they provide. The core component is an XML document called a "business registration" that contains (from a business perspective)

• "white pages" contact info
• "yellow pages" category info based on a standard taxonomy
• "green pages" tech info about the services themselves

From a technical perspective, the UDDI schema groups that information into:

• businessEntity - business info, i.e. "white pages" and "yellow pages"
  • businessService - service info, binds a set of web services to a either a business process or category of services
    • bindingTemplate - binding info, each bindingInfo points to a tModel which is metadata that describes the formal spec for the binding

-- TobyCabot - 29 Jan 2004